The Experts below are selected from a list of 2277 Experts worldwide ranked by ideXlab platform

J Capmany - One of the best experts on this subject based on the ideXlab platform.

  • Optical uwb pulse generator using an n tap microwave photonic filter and phase inversion adaptable to different pulse modulation formats
    Optics Express, 2009
    Co-Authors: Mario Bolea, J Mora, B Ortega, J Capmany
    Abstract:

    We propose theoretically and experimentally demonstrate an Optical Architecture for flexible Ultra-Wideband pulse generation. It is based on an N-tap reconfigurable microwave photonic filter fed by a laser array by using phase inversion in a Mach-Zehnder modulator. The proposed system permits a full reconfigurability of photonic microwave filter and therefore high-order UWB pulses can be generated to successfully satisfy the FCC regulation. Moreover, the photonic UWB pulse generator is adaptable to different pulse modulation formats since the amplitude, polarity and time delay of generated pulses can be controlled with a reconfiguration time up to tens of nanoseconds.

Nikos Pleros - One of the best experts on this subject based on the ideXlab platform.

N. Calabretta - One of the best experts on this subject based on the ideXlab platform.

  • Fully SDN-enabled all-Optical Architecture for data center virtualization with time and space multiplexing
    IEEE OSA Journal of Optical Communications and Networking, 2018
    Co-Authors: K. Kondepu, C. Jackson, Y. Ou, A. Beldachi, A. Pagès, F. Agraz, F. Moscatelli, W. Miao, V. Kamchevska, N. Calabretta
    Abstract:

    Virtual data center (VDC) solutions provide an environment that is able to quickly scale up, and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers must support multiple simultaneous tenants with isolated networks on the same physical substrate. The provider must make efficient use of its available physical resources while providing high-bandwidth and low-latency connections to tenants with a variety of VDC configurations. This paper utilizes state-of-the-art Optical network elements to provide high-bandwidth Optical interconnections and develop a VDC Architecture to slice the network and the compute resources dynamically, to efficiently divide the physical network between tenants. We present a data center virtualization Architecture with a softwaredefined networking controlled all-Optical data plane combining Optical circuit switching and a time-shared Optical network. Developed network orchestration dynamically translates and provisions VDCs requests onto the Optical physical layer. The experimental results show the provisioned bandwidth can be varied by adjusting the number of time slots allocated in the time-division multiplexing (TDM) network. These results lead to recommendations for provisioning TDM connections with different performance characteristics. Moreover, application-level Optical switch reconfiguration time is also evaluated to fully understand the impact on application performance in VDC provision. The experimental demonstration confirmed that the developed VDC approach introduces negligible delay and complexity on the network side.

Mario Bolea - One of the best experts on this subject based on the ideXlab platform.

  • Optical uwb pulse generator using an n tap microwave photonic filter and phase inversion adaptable to different pulse modulation formats
    Optics Express, 2009
    Co-Authors: Mario Bolea, J Mora, B Ortega, J Capmany
    Abstract:

    We propose theoretically and experimentally demonstrate an Optical Architecture for flexible Ultra-Wideband pulse generation. It is based on an N-tap reconfigurable microwave photonic filter fed by a laser array by using phase inversion in a Mach-Zehnder modulator. The proposed system permits a full reconfigurability of photonic microwave filter and therefore high-order UWB pulses can be generated to successfully satisfy the FCC regulation. Moreover, the photonic UWB pulse generator is adaptable to different pulse modulation formats since the amplitude, polarity and time delay of generated pulses can be controlled with a reconfiguration time up to tens of nanoseconds.

Stelios Pitris - One of the best experts on this subject based on the ideXlab platform.